This Acoustic Audio 7.1 channel multi-speaker system features 7 perfectly matched HD in-wall speakers and a maple 10" powered HD Series subwoofer. The system consist of (6) rectangle 8" HD in-wall/ceiling speakers, (1) center channel HD in-wall speaker, and (1) maple 10" high definition powered sub. Authentic Kevlar components in the woofers and the titanium tweeters ensure true clarity. Each 8" surround speaker handles 350 watts of power (175W RMS) while the center handles 350 watts of power (175W RMS) and features dual 6.5" Kevlar cone woofers with a soft dome tweeter.The HD sub sports an 10" front-firing woofer with a woven Kevlar cone and has a built-in 600 watt amplifier. The advanced bass reflex cabinet is equipped with a rear slotted bass port. It has an adjustable gain control and a variable crossover so you can perfectly match the bass response with your speakers. The high and low inputs let you use any receiver or amplifier and its maple finish fits with any decor.